Multi-Client GST Automation Platform

I need a cloud-based GST compliance platform built specifically for a CA firm that handles multiple clients and registrations. The application must automate everything from data ingestion to final filing while remaining simple enough for non-technical users on both the firm side and the client side... (Budget: ₹75000 - ₹150000 INR, Jobs: API Development, C# Programming, Cloud Computing, PHP, Software Architecture, Software Development, Visual Basic, Web Development)